8972139 has 16 divisors (see below), whose sum is σ = 13618944. Its totient is φ = 5200800.

The previous prime is 8972137. The next prime is 8972147. The reversal of 8972139 is 9312798.

It is not a de Polignac number, because 8972139 - 2¹ = 8972137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8972097 and 8972106.

It is not an unprimeable number, because it can be changed into a prime (8972137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5152 + ... + 6669.

It is an arithmetic number, because the mean of its divisors is an integer number (851184).

Almost surely, 2^8972139 is an apocalyptic number.

8972139 is a deficient number, since it is larger than the sum of its proper divisors (4646805).

8972139 is a wasteful number, since it uses less digits than its factorization.

8972139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11858.

The product of its digits is 27216, while the sum is 39.

The square root of 8972139 is about 2995.3529007448. The cubic root of 8972139 is about 207.7935188988.

The spelling of 8972139 in words is "eight million, nine hundred seventy-two thousand, one hundred thirty-nine".